Multi-proxy reconstructions of precipitation field in China over the past 500 years.

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(Auteur)
Zhao, sen [Key Laboratory of Meteorological Disaster of Ministry of Education, and College of Atmospheric Science, Nanjing University of Information Science and Technology, Nanjing, 210044, China]

The dominant modes of variability of precipitation for the whole of China over the past millennium and the mechanism governing their spatial structure remain unclear. This is mainly due to insufficient high-resolution proxy records of precipitation in western China. Numerous treering chronologies have recently been archived in publicly available databases through PAGES2k activities, and these provide an opportunity to refine precipitation field reconstructions for China. Based on 479 proxy records, including 371 tree-ring width chronologies, a tree-ring isotope chronology, and 107 drought/flood indices, we reconstruct the precipitation field for China for the past half millennium using the optimal information extraction method. A total of 3631 of 4189 grid points in the reconstruction field passed the cross-validation process, accounting for 86.68 % of the total number of grid points. The first leading mode of variability of the reconstruction shows coherent variations over most of China. The second mode is a north–south dipole in eastern China characterized by variations of the same sign in western China and northern China (except for Xinjiang province). It is likely controlled by the El Niño–Southern Oscillation (ENSO) variability. The third mode is a “sandwich” triple mode in eastern China including variations of the same sign in western China and central China. The last two modes are reproduced by most of the six coupled climate models’ last millennium simulations performed in the framework of the Paleoclimate Modelling Intercomparison Project Phase III (PMIP3). In particular, the link of the second mode with ENSO is confirmed by the models. However, there is a mismatch between models and proxy reconstructions in the time development of different modes. This mismatch suggests the important role of internal variability in the reconstructed precipitation mode variations of the past 500 years.

Christiansen Bo, Reconstructing the NH Mean Temperature: Can Underestimation of Trends and Variability Be Avoided?, 10.1175/2010jcli3646.1

Christiansen Bo, Ljungqvist Fredrik Charpentier, Reconstruction of the Extratropical NH Mean Temperature over the Last Millennium with a Method that Preserves Low-Frequency Variability, 10.1175/2011jcli4145.1

Hirota Nagio, Takahashi Masaaki, A tripolar pattern as an internal mode of the East Asian summer monsoon, 10.1007/s00382-012-1416-y

Huang, R. and Li, W.: Influence of heat source anomaly over the western tropical Pacific on the subtropical high over East Asia during summer and its physical mechanism, Chin. J. Atmos. Sci., 107–117, 1988 (in Chinese).

Ronghui Huang, Yifang Wu, The influence of ENSO on the summer climate change in China and its mechanism, 10.1007/bf02656915

Song Fengfei, Zhou Tianjun, The Crucial Role of Internal Variability in Modulating the Decadal Variation of the East Asian Summer Monsoon–ENSO Relationship during the Twentieth Century, 10.1175/jcli-d-14-00783.1

Wu Bo, Li Tim, Zhou Tianjun, Relative Contributions of the Indian Ocean and Local SST Anomalies to the Maintenance of the Western North Pacific Anomalous Anticyclone during the El Niño Decaying Summer*, 10.1175/2010jcli3300.1

Zhang, D.: Method to reconstruct climatic series for the past 500 years and its reliability, Collected Papers of Meteorological Science and Technology, 4, 17–26, 1983 (in Chinese).

Zhang, D.: The method for reconstruction of the dryness/wetness series in China for the last 500 years and its reliability, in: The reconstruction of climate in China for historical times, edited by: Zhang, J., Science Press, Beijing, China, 18–30, 1988.